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| 1 | Towards developing Mg alloys with simultaneously improved strength and corrosion resistance via RE alloying显示文摘Magnesium(Mg)alloys have received an increasing interest in the past two decades for their tremendous application potential.The strength and corrosion resistance levels of common Mg alloys are still relativity low,and especially they are to be improved simultaneously.The addition of rare earth(RE)to Mg alloys is believed to be beneficial for both the strength and corrosion resistance,and some RE-modified traditional Mg alloys have been studied and some new RE-containing Mg alloys have been developed by now.However,further simultaneous improvements in both strength and anti-corrosion require a better understanding of the behavior and mechanism of RE in Mg alloys.In this review,the common influence mechanisms of RE on mechanical and anti-corrosion properties of Mg alloys are summarized,and the latest research progress of RE-containing Mg alloys with simultaneously improved strength and corrosion resistance are introduced.It is demonstrated that the research on high-strength and high corrosion resistant RE-containing Mg alloys is still immature,and some opinions and suggestions are put forward for the synergetic improvement of the strength and corrosion resistance of Mg alloys,so as to contribute to the further development of Mg alloys with higher performance. | Jinshu Xie Jinghuai Zhang Zihao You Shujuan Liu Kai Guan Ruizhi Wu Jun Wang Jing Feng | 2021 | Journal of Magnesium and Alloys2021，9，1： | 25 |
| 2 | Enhanced Electromagnetic Interference Shielding in a Duplex-Phase Mg-9Li-3Al-1Zn Alloy Processed by Accumulative Roll Bonding显示文摘High electromagnetic shielding performance was achieved in the Mg-9Li-3Al-1Zn alloy processed by accumulative roll bonding(ARB).The microstructure,electromagnetic interference shielding effectiveness(SE) in the frequency of 30-1500 MHz and mechanical properties of the alloy were investigated.A model based on the shielding of the electromagnetic plane wave was used to theoretically discuss the EMI shielding mechanisms of ARB-processed alloy.Results indicate that the SE of the material increases gradually with the increase in the ARB pass.The enhanced SE can be attributed to the obvious microstructure orientation caused by ARB,and the alternative arrangement of alpha(Mg) phase and beta(Li)phase.In addition,with the increase in ARB pass,the number of interfaces between layers increases and the grain orientation of each layer tends to alignment along c-axis,which is beneficial to the reflection loss and multiple reflection loss of the incident electromagnetic wave. | Jiahao Wang Lin Xu Ruizhi Wu Jing Feng Jinghuai Zhang Legan Hou Milin Zhang | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，4： | 6 |
| 3 | Development of extruded Mg-6Er-3Y-1.5Zn-0.4Mn(wt.%) alloy with high strength at elevated temperature显示文摘A new Mg-6 Er-3 Y-1.5 Zn-0.4 Mn(wt.%) alloy with high strength at high temperature was designed and extruded at 350℃. The as-extruded alloy exhibits ultimate tensile strength of 301 MPa, yield strength(along ED) of 274 MPa and thermal conductivity of 73 W/m·K at 300℃. Such outstanding hightemperature strength is mainly attributed to the formation of nano-spaced solute-segregated basal plane stacking faults(SFs) with a large aspect ratio throughout the entire Mg matrix, fine dynamically recrystallized(DRXed) grains of 1–2μm and strongly textured un-DRXed grains with numerous sub-structures.Microstructural examination unveils that long period stacking ordered(LPSO) phases are formed in Mg matrix of the as-cast alloy when rational design of alloy composition was employed, i.e.(Er + Y): Zn = 3:1 and Er: Y = 1: 1(at.%). It is worth mentioning that it is the first report regarding the formation of nano-spaced basal plane SFs throughout both DRXed and un-DRXed grains in as-extruded alloy with well-designed compositions and processing parameters. The results provide new opportunities to the development of deformed Mg alloys with satisfactory mechanical performance for high-temperature services. | Mingquan Zhang Yan Feng Jinghuai Zhang Shujuan Liu Qiang Yang Zhuang Liu Rongguang Li Jian Meng Ruizhi Wu | 2019 | Journal of Materials Science & Technology2019，35，10： | 5 |
| 4 | Development of high mechanical properties and moderate thermal conductivity cast Mg alloy with multiple RE via heat treatment显示文摘A new cast Mg–2 Gd–2 Nd–2 Y–1 Ho–1 Er–0.5 Zn–0.4 Zr(wt%) alloy was prepared by direct-chill semicontinuous casting technology. The microstructure, mechanical properties and thermal conductivity of the alloy in as-cast, solid-solution treated and especially peak-aged conditions were investigated. The as-cast alloy mainly consists of β-Mg matrix,(Mg, Zn)_3 RE phase and basal plane stacking faults. After proper solid-solution treatment, the microstructure becomes almost Mg-based single phase solid solution except just very few RE-riched particles. The as-cast and solid-solution treated alloys exhibit moderate tensile properties and thermal conductivity. It is noteworthy that the Mg alloy with 8 wt% multiple RE exhibits remarkable age-hardening response( HV = 35.7), which demonstrates that the multiple RE(RE = Gd, Nd, Y, Ho, Er) alloying instead of single Gd can effectively improve the age-hardening response.The peak-aged alloy has a relatively good combination of high strength/hardness(UTS(ultimate tensile strength) > 300 MPa; TYS(tensile yield strength) > 210 MPa; 115.3 HV), proper ductility(ε≈ 6%) and moderate thermal conductivity(52.5 W/(m K)). The relative mechanisms mainly involving aging precipitation of β￠ and β'' phases were discussed. The results provide a basis for development of high performance cast Mg alloys. | Guoqiang Li Jinghuai Zhang Ruizhi WU Yan Feng Shujuan Liu Xiaojun Wang Yufeng Jiao Qiang Yang Jian Meng | 2018 | Journal of Materials Science & Technology2018，34，7： | 4 |
| 5 | Hypoglycemic effects of aqueous extract of Rhizoma Polygonati Odorati in mice and rats显示文摘 | Hong bin Chen Ruizhi Feng Yi Guo | 2001 | Journal of Ethnopharmacology2001，74，： | 1 |
| 6 | Performance and emission characteristics of DME engine with high ratio of EGR 显示文摘 | SONG Ruizhi LIKe FENG Yang | 2009 | Energy Fuels2009，23，： | 1 |
| 7 | Toxicity studies of Rhizoma Polygonati odorati 显示文摘 | Cheu Hongbin Feng Ruizhi Guo Yi | 2001 | JEt hnopharmacol2001，74，3： | 1 |
| 8 | Hypoglycemic effects of aqueous extract of Rhizoma Polygonati Odorati in mice and rats显示文摘 | Hongbin Chen Ruizhi Feng Yi Guo | 2001 | Journal of Ethnopharmacology2001，74，： | 1 |
| 9 | The electrochemical behaviors of Mg–8Li–0.5Y and Mg–8Li–1Y alloys in sodium chloride solution显示文摘 | Yanzhuo Lv Min Liu Yan Xu Dianxue Cao Jing Feng Ruizhi Wu Milin Zhang | 2013 | Journal of Power Sources2013，，： | 1 |
| 10 | Existing tests vs. novel non-invasive assays for detection of invasive aspergillosis in patients with respiratory diseases显示文摘Background: Although existing mycological tests (bronchoalveolar lavage [BAL] galactomannan [GM], serum GM, serum (1,3)-β-D-glucan [BDG], and fungal culture) are widely used for diagnosing invasive pulmonary aspergillosis (IPA) in non-hematological patients with respiratory diseases, their clinical utility in this large population is actually unclear. We aimed to resolve this clinical uncertainty by evaluating the diagnostic accuracy and utility of existing tests and explore the efficacy of novel sputum-basedAspergillus assays.Methods: Existing tests were assessed in a prospective and consecutive cohort of patients with respiratory diseases in West China Hospital between 2016 and 2019 while novel sputum assays (especially sputum GM andAspergillus-specific lateral-flow device [LFD]) in a case-controlled subcohort. IPA was defined according to the modified European Organization for Research and Treatment of Cancer/Mycoses Study Group criteria. Sensitivity and specificity were computed for each test and receiver operating characteristic (ROC) curve analysis was performed.Results: The entire cohort included 3530 admissions (proven/probable IPA=66, no IPA=3464) and the subcohort included 127 admissions (proven/probable IPA=38, no IPA=89). Sensitivity of BAL GM (≥1.0 optical density index [ODI]: 86% [24/28]) was substantially higher than that of serum GM (≥0.5 ODI: 38% [39/102]) (χ^(2)=19.83,P<0.001), serum BDG (≥70 pg/mL: 33% [31/95]) (χ^(2)=24.65,P<0.001), and fungal culture (33% [84/253]) (χ^(2)=29.38,P<0.001). Specificity varied between BAL GM (≥1.0 ODI: 94% [377/402]), serum GM (≥0.5 ODI: 95% [2130/2248]), BDG (89% [1878/2106]), and culture (98% [4936/5055]). Sputum GM (≥2.0 ODI) had similar sensitivity (84% [32/38]) (Fisher’s exactP=1.000) to and slightly lower specificity (87% [77/89]) (χ^(2)=5.52,P=0.019) than BAL GM (≥1.0 ODI). Area under the ROC curve values were comparable between sputum GM (0.883 [0.812-0.953]) and BAL GM (0.901 [0.824-0.977]) (P=0.734). Sputum LFD had similar specificity (91% [81/89]) (χ^(2)=0.89,P=0.345) to and lower sensitivity (63% [24/38]) (χ^(2)=4.14,P=0.042) than BAL GM (≥1.0 ODI), but significantly higher sensitivity than serum GM (≥0.5 ODI) (χ^(2)=6.95,P=0.008), BDG (χ^(2)=10.43,P=0.001), and fungal culture (χ^(2)=12.70,P<0.001).Conclusions: Serum GM, serum BDG, and fungal culture lack sufficient sensitivity for diagnosing IPA in respiratory patients. Sputum GM and LFD assays hold promise as rapid, sensitive, and non-invasive alternatives to the BAL GM test. | Wei Xiao Longyi Du Linli Cai Tiwei Miao Bing Mao Fuqiang Wen Peter Gerard Gibso Deying Gong Yan Zeng Mei Kang Xinmiao Du Junyan Qu Yan Wang Xuemei Liu Ruizhi Feng Juanjuan Fu | 2022 | Chinese Medical Journal2022，，13： | 0 |
| 11 | An infant monitoring system with the support of accurate real-time indoor positioning显示文摘This article presents an indoor infant monitoring system based on Android system which employs a low-cost Bluetooth Low Energy(BLE)pseudolite to accurately locate the infants in the activity indoors and timely remind the parents.It can achieve a positioning accuracy better than 2 m and effectively reduce the risk of injury to infants and young children.The performance of the proposed system,using false negative rate,false alarm rate,and alarm response time as indicators,is compared with that of the system using Quuppa as a positioning source.The experiment results show that both BLE pseudolite and Quuppa as a positioning source can basically meet the positioning accuracy for the infant monitoring system,but the BLE-pseudolite-based system provides a more cost-efficient solution. | Zhipeng Cao Yifan Cheng Ruizhi Chen Guangyi Guo Feng Ye Liang Chen Yuanjin Pan | 2019 | Geo-Spatial Information Science2019，22，4： | 0 |
| 12 | Ultra-high strength Mg-Li alloy with B2 particles and spinodal decomposition zones显示文摘The bcc-structured Mg-Li alloy is currently the engineering metallic material with the lowest density,but it has not been widely used due to its low strength.In this paper,alloying Zn effectively improves the strength of the bcc-structured Mg-Li alloy.Due to the semi-coherent B2 structured nanoparticles,the compressive yield strength of the as-cast Mg-13Li-9Zn alloy reaches higher than 300 MPa.Due to the solid solution strengthening of Zn and the spinodal zone,the compressive yield strength of the as-quenched Mg-13Li-15Zn(LZ1315)alloy immediately increases to 400 MPa.In addition,the as-quenched LZ1315 alloy exhibits natural aging strengthening behavior.Due to the precipitation of B2 nanoparticles,the yield strength of the peak aged alloy is up to 495 MPa. | Shun Zhang Ruizhi Wu Feng Zhong Xiaochun Ma Xiang Wang Qiang Wu | 2023 | Fundamental Research2023，3，3： | 0 |
| 13 | Preparation and characterization of a novel blue-TiO_(2)/PbO_(2)-carbon nanotube electrode and its application for degradation of phenol显示文摘In this study,we fabricated a blue-TiO_(2)/PbO_(2)-carbon nanotube (CNT) electrode in which blue TiO_(2)nanotube arrays (blue-TNA) served as the substrate for PbO_(2)-CNT eletrodeposition.Scanning electron microscope (SEM) showed compact surface structure of the electrode.The β-PbO_(2)crystal structure was detected by X-ray diffraction (XRD).The distribution of Pb,O,C,and Na elements on the electrode surface have been confirmed by X-ray photoelectron spectroscopy (XPS).Blue-TiO_(2)/PbO_(2)-CNT electrode had higher response current (213.12mA),larger active surface area and lower charge transfer resistance (2.22Ω/cm^(2)) than conventional TiO_(2)/PbO_(2)-CNT electrode.The influences of current density,initial phenol concentration,initial solution pH,and Na2SO_(4)concentration on the electrochemical oxidation of phenol have been analyzed.The results showed that the 100 mg/L phenol could be destroyed completely after 210 min,and chemical oxygen demand (COD) removal rate was 89.3%within 240 min.Additionally,the electrode showed long actual lifetime (5468.80 hr) and low energy consumption (0.08 kWh/gCOD).A phenol degradation mechanism was proposed by analyzing the intermediate products with high-performance liquid chromatography-mass spectrometry (HPLC-MS).Importantly,the blue-TiO_(2)/PbO_(2)-CNT electrode exhibited superior stability and high degradation efficiency after 15 times reuse,demonstrating its promising application potential on phenol-containing wastewater treatment. | Yangchun Xu Ruizhi Feng Minglu Zhang Caigan Yan Junyu Liu Tingting Zhang Xiaohui Wang | 2023 | Journal of Environmental Sciences2023，，4： | 0 |
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